If an instrument measures in units of 1, then any between which two values would be measured as 5?

i'm assuming it's looking for the missing length, which should be 4cm

hope this !

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.